Patent classifications
B
PERFORMING OPERATIONS; TRANSPORTING
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B28
WORKING CEMENT, CLAY, OR STONE
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B28B
SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
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B28B7/40
characterised by means for modifying the properties of the moulding material
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B28B7/44
for treating with gases or degassing, e.g. for de-aerating
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